first start after H/C install and no oil pressure...
12-31-2009, 04:50 PM
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first start after H/C install and no oil pressure... After having the car apart for over 3 months, I finally cranked up the car (98 t/a) after installing a new cam, ported heads, new oil pump, etc and there was no leaks or anything but after waiting the 5 longest seconds of my life the oil pressure gauge was still at the bottom of the gauge. please help!
12-31-2009, 05:03 PM
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Idk if this means anything but after both cranking the engine with the fuel pump fuse/ignition fuse removed and with the fuse in place the gauge went up once the car was shut off/keys removed.
Also its about 10 degrees outside and everything sounds and looks fine otherwise.
Also its about 10 degrees outside and everything sounds and looks fine otherwise.
Last edited by LT1T/A; 12-31-2009 at 05:13 PM.
12-31-2009, 09:46 PM
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its sooo easy to incorrectly install the oil pickup oring! it happend to me a couple of months ago. it took me a while to accept the fact that i was going to have to pull the oil pan off again!
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01-01-2010, 12:48 AM
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02-21-2010, 08:03 PM
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Update: So after taking off the oil filter and cranking the engine w/o the fuel, there was absolutely no change in oil drainage/dripage or spraying. I got to the oil pump and dissembled the pump. All the parts looked good despite not much noticeable porting work being done to it (it was a TSP ls6 ported pump).
This time I packed the pump with grease and reassembled it. The 0-ring I previously used didnt fit as snug as the new blue ring I got from GM. The old one was brown and thicker. The back of the pickup tube was covered in oil even with the pan being dropped a bit. Also, I blew compressed air into the tube to check for obstructions and the oil bubbled a lot.
Im going to fire it back up this week once I get some threaded rod to push the pulley back on. I hope all this was was the o-ring and/or lack of prime *fingers crossed*
This time I packed the pump with grease and reassembled it. The 0-ring I previously used didnt fit as snug as the new blue ring I got from GM. The old one was brown and thicker. The back of the pickup tube was covered in oil even with the pan being dropped a bit. Also, I blew compressed air into the tube to check for obstructions and the oil bubbled a lot.
Im going to fire it back up this week once I get some threaded rod to push the pulley back on. I hope all this was was the o-ring and/or lack of prime *fingers crossed*
02-25-2010, 12:00 AM
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Finished reassembling the engine tonight and it took about a good 7 sec of cranking the engine w/ the fuel fuse pulled to build pressure but boy did it build!
Upon start up it was about 70 psi and after letting it run for a few minutes it dropped to a sustainable 60 psi. Drove it 15 min home keeping the rpms bellow 2000 and it stayed at 60 during idle the whole time. Before I tore it down, the pressure was 40 psi during idle while hot.
Changed the oil when I got home and now I just have to save up a bit of $ to get it tuned by Straightline. Feels good
Upon start up it was about 70 psi and after letting it run for a few minutes it dropped to a sustainable 60 psi. Drove it 15 min home keeping the rpms bellow 2000 and it stayed at 60 during idle the whole time. Before I tore it down, the pressure was 40 psi during idle while hot.
Changed the oil when I got home and now I just have to save up a bit of $ to get it tuned by Straightline. Feels good
03-03-2010, 09:36 PM
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Man I'm going through the same exact thing. I just finished the heads/cam an hour ago and my oil pressure is very low at idle, usually around 10 psi but has dropped as low as 6 psi. It builds pressure up to 40 psi when I rev the motor a little. Sounds like that o-ring, lot of work just for that little ring. BTW, I also purchased a TSP ported LS6 oil pump, and also installed that same blue o-ring you described.
03-04-2010, 01:16 AM
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Man I'm going through the same exact thing. I just finished the heads/cam an hour ago and my oil pressure is very low at idle, usually around 10 psi but has dropped as low as 6 psi. It builds pressure up to 40 psi when I rev the motor a little. Sounds like that o-ring, lot of work just for that little ring. BTW, I also purchased a TSP ported LS6 oil pump, and also installed that same blue o-ring you described.
I gouged a chunk out of an o-ring trying to fit it in the first time too.